Upgrade to ember rc.6.1
Merge pull request #459 from kleinsch/upgrade-ember-rc.6.1

Upgrade to Ember rc.6.1
Fixes #472 - broken images for bank account and card instructions
Fixes #421 - can't debit using cards. Also fixes error display when customer has no cards or verified bank accounts
Add instructions to README about img build dependencies
Move test-specific jshint options to a test-specific .jshintrc
Fixes #455 - when submitting a modal and an error occurs but there are no validation errors, display error messages to the user in the modal
Fix jshint
Add date filters for logs (not inserted because back-end doesn't work)
Clean up tests